I changed the url of my environment, but the edit 'failed' and now I have no access - any suggestions?

I changed the url of my environment, but the edit 'failed' and now I have no access - any suggestions?
Are you able to provide anymore details about the error?
When you change the URL it can take up to 24hrs to propagate. Have you tried accessing the environment by the new and old URLs?
If nothing is working I would recommend raising a support request with Microsoft via the Power Platform Admin Centre